气候变化领域集成服务门户(CCPortal): Strengthened linkage between November/December North Atlantic Oscillation and subsequent January european precipitation after the late 1980s

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DOI	10.1175/JCLI-D-19-0662.1
	Strengthened linkage between November/December North Atlantic Oscillation and subsequent January european precipitation after the late 1980s
	Liu Y.; He S.
发表日期	2020
ISSN	0894-8755
起始页码	8281
结束页码	8300
卷号	33 期号:19
英文摘要	This work investigates the nonsynchronous relationship between the North Atlantic Oscillation (NAO) and winter European precipitation. The results indicate that the linkage between early-winter (November and December) NAO and the following January precipitation and atmospheric circulation over the North Atlantic and European sectors became statistically significant after the late 1980s. Before the late 1980s, January precipitation and atmospheric circulation are weakly correlated with early-winter NAO. After the late 1980s, by contrast, the positive phase of the early-winter NAO is generally followed by an anomalous meridional dipole pattern with barotropic structure over the North Atlantic, which provides conditions for more (less) precipitation south of Iceland (east of the Azores). Further analysis elucidates that this regime shift may be partly attributed to the change of early-winter NAO, which is concurrent with significant change in the intensity of the synoptic and low-frequency eddy interaction over the Atlantic-European sectors. Anomalous positive sea level pressure and geopotential height, along with zonal wind anomalies associated with a positive early-winter NAO over the North Atlantic, are more significant and extend more northeastward after the late 1980s, which may be induced by an intensified transient eddy feedback after the late 1980s, as well as the enhanced storm-track activity over the North Atlantic. Thus, early-winter NAO can induce significant ocean temperature anomalies in the North Atlantic after the late 1980s, which extend downward into the middle parts of the thermocline and persist until the following January to trigger NAO-like atmospheric circulation patterns. Analyses from the Community Earth System Model large ensemble simulations indicate the effects of internal climate variability on such a strengthened linkage. © 2020 American Meteorological Society.
英文关键词	Atmospheric pressure; Climate models; Earth (planet); Sea level; Atmospheric circulation; Atmospheric circulation patterns; Barotropic structures; Ensemble simulation; European precipitations; Geo-potential heights; Internal climate variability; North Atlantic oscillations; Climatology; atmospheric circulation; barotropic mode; climate modeling; meridional circulation; North Atlantic Oscillation; precipitation (climatology); regional climate; winter; Azores; Iceland; Portugal
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171107
作者单位	Nansen-Zhu International Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Climate Change Research Center, Chinese Academy of Sciences, Beijing, China; Geophysical Institute, University of Bergen, Bjerknes Centre for Climate Research, Bergen, Norway
推荐引用方式 GB/T 7714	Liu Y.,He S.. Strengthened linkage between November/December North Atlantic Oscillation and subsequent January european precipitation after the late 1980s[J],2020,33(19).
APA	Liu Y.,&He S..(2020).Strengthened linkage between November/December North Atlantic Oscillation and subsequent January european precipitation after the late 1980s.Journal of Climate,33(19).
MLA	Liu Y.,et al."Strengthened linkage between November/December North Atlantic Oscillation and subsequent January european precipitation after the late 1980s".Journal of Climate 33.19(2020).